You extract the essence of weightlessness out of a cloud, which takes the form of a clear, thick, sticky liquid. This substance seems to make its container lighter. It can be mixed with nearly any physical object in a variety of ways, known to most pegasus craftsponies. An object properly combined with cloud essence can be placed on a cloud as though the cloud were a solid object, and will levitate if touched or pulled by a Pegasus.

Drinking cloud essence will cause creatures to temporarily levitate. Without the means to fly, however, they have no way to control their movement except to grab onto nearby objects. The cloud essence from one casting of this spell is enough to levitate one medium creature for one hour. Drinking multiple doses of cloud essence is not advised, as the drinker will begin to rise continuously at a rate of 5ft/round until the magic wears off.

Nope. Crafting in 5e is kind of underdeveloped. They use a Tool Proficiency system where as part of the player's Background selection, the player can choose two musical instruments, languages, and/or the tools of a particular profession like a blacksmith. It's mainly a RP/flavor perk, and the devs don't seem to give it much mechanical weight.

Actually making use a tool proficiency for crafting is ridiculous though. You can only complete 5gp worth of progress on an item per day, which means you literally need to spend almost a year to complete a suit of Full Plate (1500g). The benefit is that you craft stuff at 1/2 normal cost, which isn't much of a mechanical benefit since, for the most part, the game generally discourages the purchasing of magic items with money like in Pathfinder.